Characteristics of participating trauma centers (n=45)
| Geographical location, n (%) | |
| Northeast | 11 (24.4) |
| Mid-Atlantic | 6 (13.3) |
| Southeast | 3 (6.7) |
| Midwest | 12 (26.7) |
| Southwest | 11 (24.4) |
| Northwest | 1 (2.2) |
| International | 1 (2.2) |
| Location, n (%) | |
| Urban | 32 (71.1) |
| Suburban | 9 (20.0) |
| Rural | 4 (8.9) |
| Designated level, n (%) | |
| 1+ | 39 (86.7) |
| 2 | 6 (13.3) |
| Facility size, n (%) | |
| <200 beds | 1 (2.2) |
| 200–400 beds | 10 (22.2) |
| 401–600 beds | 10 (22.2) |
| >600 beds | 24 (53.3) |
| Trauma admissions per year, mean (SD) | 2571 (1550) |